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From: robbel@fwi.uva.nl (Robert Belleman)
Newsgroups: comp.sys.amiga.programmer
Subject: Re: Message Ports
Message-ID: <1991Jun7.140841.28168@fwi.uva.nl>
Date: 7 Jun 91 14:08:41 GMT
References: <BQAcp*wk@asgard.pub.uu.oz.au> <22192@cbmvax.commodore.com>
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drysdale@cbmvax.commodore.com (Scott Drysdale) writes:
>In article <BQAcp*wk@asgard.pub.uu.oz.au> bart@asgard.pub.uu.oz.au (John Butcher) writes:
>>been trying to do message ports, but I havent had lots of success, my ports
>>wont get properly recognized by name.  Below small test program I wrote :

[small test program deleted]

>CreatePort() simply points to the name you give it (argv[1] in your case).
>you want to do something like this:
>
>	char *name;
>	name = AllocMem(strlen(argv[1]) + 1, MEMF_PUBLIC);
>	strcpy(name, argv[1]);
>	mp = CreatePort(name, 0);
>
>*note* do NOT free(name) - you want the port to live forever (or until
>you delete it, whichever comes first).

I think that's dirty code.

Say, as another example like this, I'd want to change the name of a task,
_permanently_ ;
(hold on; following is all from memory)

main(int argc, char *argv[])
{
	struct *Task mytask;

	mytask = FindTask(NULL);			/* find _this_ task	*/
	mytask->tc_Node.ln_Name = argv[1];
}

... would obviously not work for the same reason as John's code.

But if I would change this to what Scot suggests (allocating memory for the
name, copying argv[1] to that memory and putting the name pointer to that and
NOT freeing anything), this would eat memory as I won't be able to free() it
anymore after my program exits! Even when the task exits!

How would you handle this situation?

>> John Butcher : bart@asgard.pub.uu.oz.au

>  --Scotty
>-- 
>=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=
>Scott Drysdale           Software Engineer
>Commodore Amiga Inc.     UUCP {allegra|burdvax|rutgers|ihnp4}!cbmvax!drysdale
>		         PHONE - yes.
>"Have you hugged your hog today?"
>=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=

-- Rob
 Robert Belleman
 robbel@fwi.uva.nl

-- 
 ______________________________________________________________________
/ Robert Belleman, University of Amsterdam                             \
|  robbel@fwi.uva.nl                                                    |
|  robbel@nki.nl                                                        |